The SNAP-AOD-29-HFi is a high-speed time proportional output (TPO) and pulse width modulation (PWM) module that converts an analog value to a digital on/off output. Each channel can switch 100 mA of load current ranging from 2.5 VDC to 24 VDC supplied externally, over a period range of 0.00001 seconds to 64.25 seconds (0-100 kHz).

The two channels are optically isolated from each other.
Five volts through a 200 Ohm pull-up resistor are provided
internally for each channel for use with TTL loads. This feature
means you don’t have to provide the pull-up voltage supply
required for each output.

If your application doesn't require high-speed output, see the SNAP-AOD-29.

NOTE: If you are using a SNAP PAC IO4AB system to communicate with an Allen-Bradley PLC, you don't need this module. Instead, use the built-in TPO functionality available on all SNAP-PAC brains that support IO4AB.